Statistcis Flashcards
1
Q
Spearman rank correlation
A
Find significant association between 2 sets of measurements from same sample
Have between 5 and 30 pairs of measurements
Aperture width and shell length in dog whelks
Null hypothesis: no correlation
2
Q
T-test
A
Find if there is a significant difference between 2 means
Normally distributed data
Sample size < 25
Width of ivy leaves in shaded and light areas
Work out probability that mean difference, due to chance
If greater than 5%, accept Ho
Ho: No significant difference
3
Q
Chi squared test
A
Significant difference observed no of individual categories with expected no of individuals in category with random distribution
No of blue eyes children from parents with alleles Bb BB
No diffference between observed and expected
